Don Iam assuming that the Bow does have Clear "F" Glass on both back and Belly, if so then Super glue or clear Epoxy will work, but you will need to sand the area smooth again, and then spray with DEFT. You can buy it at any hardware store.
Another idea is to send it back to Martin for restoreation. Go to Martin.com and e-mail there customer service dept. first tell them your problem they might be able to help you out.
Search the Bowyers here on Trad Gang, I think some of them do indeed do repairs....ONE SHOT...